Apparatus and process for exchanging heat between solid particles and a heat exchange medium

Abstract

An apparatus is disclosed for exchanging heat between solid particles and a heat exchange medium, comprising a housing which housing is provided with aeration means with an inlet for an aeration fluid, with an outlet opening, whereby an aeration zone is defined between the aeration means and the outlet opening, and with heat exchange means with at least one inlet and at least one outlet for the heat exchange medium and extending in at least part of the aeration zone, which apparatus further comprises an inlet conduit for solid particles that extends into the aeration zone. Use of the apparatus for the transfer of heat between a heat exchange medium and solid particles is also disclosed.

What we claim as our invention: 
     
       1. An apparatus for regenerating spent solid catalyst particles with indirect heat exchange means which comprises a housing containing an aeration zone, a first inlet means comprising a bundle of aeration tubes having openings in said end of said tubes and one or more perforations in said tubes for introduction of an aeration fluid through an open end in said first inlet means, an outlet means for passage of regenerated catalyst and spent aeration fluid from said housing, a second inlet means having two extremes for introduction of spent solid catalyst particles and an indirect heat exchange means situated in said housing wherein cooling fluid is entered to the indirect heat exchange means and warmed cooling fluid is withdrawn from said indirect heat exchange means and from said housing through a fluid withdrawal means wherein said open end of said first inlet means and said outlet means are situated to define said aeration zone and wherein said second inlet means has an inlet at one extreme for entry of spent catalyst to said second inlet means and an outlet at the other extreme to pass said spent solid catalyst particles to said housing at a point within said aeration zone. 
     
     
       2. The apparatus of claim 1 wherein said housing is substantially cylindrical. 
     
     
       3. The apparatus of claim 1 wherein said second inlet means is arranged in coaxial placement with respect to said housing. 
     
     
       4. The apparatus of claim 1 wherein said second inlet means is arranged in coaxial placement with respect to said outlet means for said regenerated catalyst and said spent aeration fluid. 
     
     
       5. The apparatus of claim 1 wherein said heat exchange means comprises a bundle of heat exchange tubes. 
     
     
       6. The apparatus of claim 1 wherein said apparatus communicates with a fluid catalytic cracking regeneration zone.